Change script location.

Split js code.
Added cache and changed loading mechanism for js sources.

script/features/draw_graph/model/BaseBackgroundDrawer.js

@@ -0,0 +1,89 @@
+/**
+ * Graph drawer.
+ */
+ 
+ 
+function CommonBackgroundStyle()
+{
+	this.commonColor   = '#ffffff';
+	this.commonOpacity = 1.0;
+    this.image = null;
+}
+
+CommonBackgroundStyle.prototype.Clear = function ()
+{
+  delete this.commonColor;
+  delete this.commonOpacity;
+  delete this.image;
+}
+
+CommonBackgroundStyle.prototype.ShouldLoad = function (field)
+{
+  return true;
+}
+
+CommonBackgroundStyle.prototype.saveToJson = function (field)
+{
+  return JSON.stringify({commonColor: this.commonColor, commonOpacity: this.commonOpacity, image: this.image != null ? this.image.src : null});
+}
+
+CommonBackgroundStyle.prototype.loadFromJson = function (json, callbackOnLoaded)
+{
+  this.commonColor   = json["commonColor"];
+  this.commonOpacity = json["commonOpacity"];
+  this.image = null;
+  if (typeof json["image"] === 'string') {
+    this.image = new Image();
+    this.image.onload = function() {
+      callbackOnLoaded();
+    }
+    this.image.src = json["image"];
+  }
+}
+
+PrintBackgroundStyle.prototype = Object.create(CommonBackgroundStyle.prototype);
+
+function PrintBackgroundStyle()
+{
+  CommonBackgroundStyle.apply(this, arguments);
+
+	this.commonColor   = '#ffffff';
+	this.commonOpacity = 1.0;
+    this.image = null;
+}
+
+function BaseBackgroundDrawer(context)
+{   
+  this.context = context;
+}
+
+BaseBackgroundDrawer.prototype.Draw = function(style, width, height, position, scale) 
+{
+    var context = this.context;
+    
+    var rect = new Rect(position, position.add(new Point(width / scale, height / scale)));
+    
+    context.clearRect(-rect.minPoint.x, -rect.minPoint.y, rect.size().x + 1, rect.size().y + 1);
+    
+    var oldOpacity = context.globalAlpha;
+    if (style.commonOpacity > 0.0)
+    {
+        context.globalAlpha = style.commonOpacity;
+        context.fillStyle   = style.commonColor;
+        context.fillRect(-rect.minPoint.x, -rect.minPoint.y, rect.size().x + 1, rect.size().y + 1);    
+        this.DrawImage(style, width, height, position, scale);        
+    }
+    context.globalAlpha = oldOpacity;    
+}
+
+BaseBackgroundDrawer.prototype.DrawImage = function(style, width, height, position, scale) 
+{
+    if (style.image == null) {
+        return;
+    }
+
+    var context = this.context;
+    
+    context.clearRect(0, 0, style.image.width, style.image.height);    
+    context.drawImage(style.image, 0, 0)
+}